Answer:
The left problem is x=12. The right is x=10.
Step-by-step explanation:
The angles of a triangle add up to 180 degrees. In the left triangle the two given angles add up to 92. We take the 92 away from 180 (180-92=88) and then set your unknown angle = to the answer. (4+7x=88) and solve algebraically.
(7x=84)
x=12
the second question is similar. First set up your equation
(5x+6x-5+75=180) then solve for x algebraically.
(11x+70=180)
(11x=110)
x=10
